Interactive traceroute script

[the_rock]

This script lets you enter dst IP and port to show all the hops along the way. 

Lab example:

[Expert@CP-GW:0]# ./trace-explain-interactive.sh
Enter destination IP or hostname: 8.8.8.8

Choose protocol:
1) ICMP (recommended when UDP is filtered)
2) TCP SYN (port configurable; good for 80/443 allowed paths)
3) UDP (classic traceroute)
Enter choice number [1]: 3
Enter destination UDP port [33434]: 4434
Max hops (TTL) [30]:
Perform reverse DNS lookups for each hop? (y/n) [y]:

== Starting trace-explain ==
Destination: 8.8.8.8
Protocol: udp
Max TTL: 30
Port: 4434
RDNS: enabled

Default route(s):
default via 172.16.10.1 dev eth0 proto 7
2.3.4.0/29 dev eth1 proto kernel scope link src 2.3.4.5
172.16.10.0/24 dev eth0 proto kernel scope link src 172.16.10.249
172.31.10.0/24 dev eth2 proto kernel scope link src 172.31.10.249
172.31.11.0/24 dev eth2.100 proto kernel scope link src 172.31.11.249

Running: traceroute -n -m 30 -q 1 -p 4434 8.8.8.8

----- Hop 1 -----
raw: 1 172.16.10.1 2.255 ms
ip: 172.16.10.1 ptr: -
role: default gateway (first routed hop)
route: direct dev eth0 src 172.16.10.249
neigh: dev eth0 mac 48:3a:02:96:47:2d state REACHABLE

----- Hop 2 -----
raw: 2 192.168.0.4 2.255 ms
ip: 192.168.0.4 ptr: -
route: via 172.16.10.1 dev eth0 src 172.16.10.249
neigh: (no ARP/NDP entry cached)

----- Hop 3 -----
raw: 3 173.46.3.209 1.637 ms
ip: 173.46.3.209 ptr: unassigned-209.3.46.173.net.blink.ca
route: via 172.16.10.1 dev eth0 src 172.16.10.249
neigh: (no ARP/NDP entry cached)

----- Hop 4 -----
raw: 4 *
ip: -

----- Hop 5 -----
raw: 5 *
ip: -

----- Hop 6 -----
raw: 6 *
ip: -

----- Hop 7 -----
raw: 7 24.156.145.98 8.092 ms
ip: 24.156.145.98 ptr: -
route: via 172.16.10.1 dev eth0 src 172.16.10.249
neigh: (no ARP/NDP entry cached)

----- Hop 8 -----
raw: 8 209.148.230.53 5.392 ms
ip: 209.148.230.53 ptr: 9044-cgw01.mtnk.asr9k.rmgt.net.rogers.com
route: via 172.16.10.1 dev eth0 src 172.16.10.249
neigh: (no ARP/NDP entry cached)

----- Hop 9 -----
raw: 9 69.63.248.69 5.523 ms
ip: 69.63.248.69 ptr: -
route: via 172.16.10.1 dev eth0 src 172.16.10.249
neigh: (no ARP/NDP entry cached)

----- Hop 10 -----
raw: 10 72.14.216.54 4.025 ms
ip: 72.14.216.54 ptr: -
route: via 172.16.10.1 dev eth0 src 172.16.10.249
neigh: (no ARP/NDP entry cached)

----- Hop 11 -----
raw: 11 *
ip: -

----- Hop 12 -----
raw: 12 *
ip: -

----- Hop 13 -----
raw: 13 *
ip: -

----- Hop 14 -----
raw: 14 *
ip: -

----- Hop 15 -----
raw: 15 *
ip: -

----- Hop 16 -----
raw: 16 *
ip: -

----- Hop 17 -----
raw: 17 *
ip: -

----- Hop 18 -----
raw: 18 *
ip: -

----- Hop 19 -----
raw: 19 *
ip: -

----- Hop 20 -----
raw: 20 *
ip: -

----- Hop 21 -----
raw: 21 *
ip: -

----- Hop 22 -----
raw: 22 *
ip: -

----- Hop 23 -----
raw: 23 *
ip: -

----- Hop 24 -----
raw: 24 *
ip: -

----- Hop 25 -----
raw: 25 *
ip: -

----- Hop 26 -----
raw: 26 *
ip: -

----- Hop 27 -----
raw: 27 *
ip: -

----- Hop 28 -----
raw: 28 *
ip: -

----- Hop 29 -----
raw: 29 *
ip: -

----- Hop 30 -----
raw: 30 *
ip: -

== Done ==
[Expert@CP-GW:0]#

[PhoneBoy]

I opened up this script to see how you were doing traceroute with tcp and icmp.
Had no idea the standard traceroute had options for both.

[the_rock]

Lots of possibilities : - )